參數(shù)資料
型號(hào)： XR16C872
廠商： Exar Corporation
英文描述： Dual UART with 1284 Parallel Port and Plug-and-Play（PnP） Controller(雙通用異步接收器/發(fā)送器（帶1284雙向并行端口和即插即用控制器）)
中文描述： 雙UART）與1284并行端口，插頭插即用（PnP）功能控制器（雙通用異步接收器/發(fā)送器（帶1284雙向并行端口和即插即用控制器）
文件頁(yè)數(shù)： 46/60頁(yè)
文件大?。?/td> 314K
代理商： XR16C872
XR16C872
46
Rev. P1.00
Preliminary
Signal
Name
Signal
Type
Description
STROBE#
O
Active low. Indicates valid data is on the data lines.
AUTOFD#
O
Active low. Instructs the printer to automatically insert a line feed for each carriage return.
SELCTIN#
O
Active low. Used to indicate to the printer that it is selected.
INIT#
O
Active low. Used to reset the printer.
ACK#
I
A low asserted pulse used to indicate that the last character was received.
BUSY
I
A high signal asserted by the printer to indicate that it is busy and cannot take data.
PE
I
A high signal indicates that printer paper is empty.
SELECT
I
A high signal indicates that printer is online.
ERR#
I
Asserted low to indicate that some error condition exists.
PD0-PD7
O
Data.
Signal
Name
Signal
Type
Nibble mode
Name
Description
STROBE#
O
STROBE#
Not used for reverse data transfer.
AUTOFD#
O
HostBusy
Host nibble mode handshake signal. Set low to indicate host is ready
for nibble. Set high to indicate nibble has been received.
SELCTIN#
O
1284Active
Set high when host is in a 1284 transfer mode.
INIT#
O
INIT#
Not used for reverse data transfer.
ACK#
I
PtrClk
Set low to indicate valid nibble data, set high in response to
“HostBusy” going high.
BUSY
I
PtrBusy
Used for Data Bit-3, then Bit-7.
PE
I
AckDataReq
Used for Data Bit-2, then Bit-6.
SELECT
I
Xflag
Used for Data Bit-1, then Bit-5.
ERR#
I
DataAvail#
Used for Data Bit-0, then Bit-4.
PD0-PD7
O
Not used.
Table 8. Centronics, SPP Signal Description
Table 9. Nibble Mode Signal Description
相關(guān)PDF資料
PDF描述
XR16L2450 2.25V TO 5.5V DUART
XR16L2450IJ 97-3108A20-29S-KIT
XR16L2450IM 2.25V TO 5.5V DUART
XR16L2550IJ LOW VOLTAGE DUART WITH 16-BYTE FIFO
XR16L2550IL LOW VOLTAGE DUART WITH 16-BYTE FIFO
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR16C872CQ 制造商:EXAR 制造商全稱:EXAR 功能描述:DUAL UART WITH 1284 PARALLEL PORT AND PLUG-AND-PLAY CONTROLLER
XR16C872IQ 制造商:EXAR 制造商全稱:EXAR 功能描述:DUAL UART WITH 1284 PARALLEL PORT AND PLUG-AND-PLAY CONTROLLER
XR16L2450 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 5.5V DUART
XR16L2450_05 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 5.5V DUART
XR16L2450IJ 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 5.5V DUART
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